

function test()
	local str = "what the fk ru doing?"
	io.write(string.format("sin(3) = %.4f\n",math.sin(3)))
	a = io.read("*line")
	print(a)
end

function test2()
	local r = io.open("ansi.txt","r")
	if r == nil then error("can not open") 
	else
	local sline = r:lines()
	for line in sline do
		print(line)
		print(string.gsub(line,"^%-%-(.*)$","==> %1"))
	end
	
	
	r:close()
	end
	

end

--%a  abbreviated weekday name (e.g., Wed) 
--%A  full weekday name (e.g., Wednesday) 
--%b  abbreviated month name (e.g., Sep) 
--%B  full month name (e.g., September) 
--%c  date and time (e.g., 09/16/98 23:48:10) 
--%d  day of the month (16) [01-31] 
--%H  hour, using a 24-hourclock (23) [00-23] 
--%I  hour, using a 12-hour clock (11) [01-12] 
--%M  minute (48) [00-59] 
--%m  month (09) [01-12] 
--%p  either "am" or "pm" (pm) 
--%S  second (10) [00-61] 
--%w  weekday (3) [0-6 = Sunday-Saturday] 
--%x  date (e.g., 09/16/98) 
--%X  time (e.g., 23:48:10)
--%Y  full year (1998) 
--%y  two-digit year (98) [00-99] 
--%%  the character '%'

function test3()
	local a = os.clock();
	print(os.date("%X %x"))
	print(os.date("today is %A,in %B ,at %c,on %p"))
	
	print(os.getenv("PATH"))
	print(os.execute("ping www.baidu.com -n 2"));
	
	local b = os.clock();
	print(b - a)
	
end